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Altera_Forum's avatar
Altera_Forum
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20 years ago

How can i handle the pio in uclinux?

I have upload the kernal and filesystem to flash,and the kernal runs very well.Then i build the example 'hello world',it runs very well too. Now i want to handle the PIO in uclinux,like...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
20 years ago

try:# man inl

or# man outl

....

it basicaly reads a long (inl) or a byte (inb) from the port you pass as an argument or writes a long (outl) or a byte (outb).

for example: 

outb(inb(GPIO1),GPIO2);

where GPIO1 and GPIO2 are defined as base-addresses of your GPIO components.

reads a byte from the base address of one GPIO and outputs this no a second GPIO.